Non-Linear Compensated Labor Supply Elasticity

In Simple Words

Imagine climbing a walking path that starts as a broad, gentle slope where small increases in wage pull people to work significantly more hours, but then abruptly curves into a steep cliff around full-time hours where large wage increases yield almost no additional work hours.

Research question

Conventional labor supply models often assume constant wage elasticity along the intensive margin, failing to account for why work hour distributions in the economy show heavy clusters at full-time employment and relative sparsity in part-time employment.

Participants

N = 1,152 unemployed applicants in nationwide U.S. metro areas applying for phone survey and data entry positions.

Study Design

Discrete choice model tracking job choice behavior across weekly work hour bundles from 5 to 50 hours to trace the inverse labor supply curve and calculate point and polynomial-fit compensated labor supply elasticities.

Results

Compensated labor supply elasticity is highly elastic below 30 weekly work hours (exceeding 1.0), but becomes highly inelastic at 40 hours per week and above (dropping to 0.5–0.6).

Takeaway

Apply separate elasticity parameters when evaluating wage policies, utilizing an elasticity greater than 1.0 for part-time/low-hour workers and an elasticity of 0.5–0.6 for full-time workers.

Related findings

• Participation vs. Effort Elasticity (Extensive vs. Intensive Margin) →Labour & employment

  Think of opening a seasonal fruit-picking site. Increasing daily pay slightly attracts many more villagers from surrounding areas to show up for work, whereas workers already on site only pick fruit a tiny bit faster.

• Intensive Margin Daily Labor Supply Adjustment →Labour & employment

  Adjusting labor supply on the intensive margin in a developing market is like a freelance handyman who cannot change his hourly rate or get a full-time contract; instead, he increases his total earnings by booking and working additional full workdays throughout the week whenever jobs become available.

• Intensive Margin Dominance in Labor Supply Adjustment →Labour & employment

  Imagine a worker who wins a prize and decides to spend less time working. Instead of handing in a resignation letter and walking away from employment completely, the worker simply cuts back from working five days a week down to four days, keeping the exact same job and hourly pay rate.

• Low Intertemporal and Hicksian Labor Supply Elasticities →Labour & employment

  Imagine a worker who gets a small annual cash gift. Even if the worker can freely trade working time for personal leisure, the worker barely changes work schedules because daily consumption goals and career routines are strongly established, like an athlete who keeps training nearly the same number of hours every week even after receiving an allowance.